Wheel for castors



FIG. 1 is a front isometric view of a wheel for castors embodying my newdesign;

FIG. 2 is a front view thereof;

FIG. 3 is a rear isometric view thereof;

FIG. 4 is a rear view thereof; and,

FIG. 5 is an edge view thereof.

The ornamental design for a wheel for castors, as shown and described.